Type-writing machine.



PATENTED APR. 14, 1908. H. A. GARHART.

TYPE WRITING MACHINE. I APPLICATION FILED AUG. 29. 1907.

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V WITNESSES. MW

INVENTOH llllllllllll MMM ATTORNEY PATENTED APR. 14, 1908.

H. A. CARHART.

TYPE WRITING MACHINE. APPLIUATION IIILED AUG. 29. 1987.

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WITNESSES:

INVENTOR HTTOR/VEY UNITED STATES PATENT oFmoE.

HERBERT GARHART, OF SYRACUSE, NEW YORK, ASSIGNOR TO ALEXANDER T. BROWN,OF SYRACUSE, NEW YORK.

TYPE-'WBITIN G MACHINE.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed Angult 29, 1907. Serial No. 390,601.

1'0 all whom it may concern:

Be it known that I, HERBERT A.- CARHABT,

citizen of the United States, and resident of- My invention relates totypewriting ma'- chines and especially to a type bar and hangerconstruction for such machines. One of the "ob ects of m invention is toprovide an improved ball caring type bar pivot; another object is toprovide a novel constrilction of pe bar hanger having two typebarspivotei thereto, one on each side of the ban er; another object is tomake rovision or an arrangement of type ars whereby the room in the typebar segment is relation to each other.

economized to the best advanta e To these and other ends which willhereinafter appear, my invention consists in certain features ofconstruction, and combinations and arrangement of parts all of whichwill be fully set forth herein, and particularlypointedout in theclaims.

In the accompanying drawings :Figure 1 is a side elevation showing twotype bars and the means for actuating the same, arts of a, front strikety ewriting machine eing diagrammatically s 1own,-some of them insection. Fig. 2 is a side view of two type bars mounted on a sin 'le haner and off-set with plan view of the right-hand half of a front strikety e bar system constructed in accordance w1t my invention, parts beingshown in section I My invention is a plicable to typewriting machinesgenerally, but I have here shown it applied to a front striketypewriter. Said typewriter comprises a platen 10, a type bar segment11, a sub lever se I ment 12,- and printing key levers 13,-which ast arepivoted at their rear ends on a cross bar 14.

The t pe bar segment 11 supports a series of t pe h a p ate-like'stem 15which extends through and is seated in a suitable slot in the segment11, and secured therein by a headed screw 16 threaded into the segment bthe side of the v hanger stem and having its read bearing on the upperedge of said stem; the hangers may,

"however, be secured to the segment in any other suitable manner. Theforward end of ig. 3 is a developed.

ar hangers each of whlch comprises 18 secured to the face oftheassociate( circular boss on the hanger by a headed screw 1 9, the headof said screw bein preferably counter-sunk into the plate as shown, soas not to pro'ect beyond the plate and thus unnecessari y to widen orthicken the bearing. Pins 20 passing through the plates 18 and intosuitable openin s in the faces of the circular bosses on the rangers,prevent the plates from turning on the screws 19. Each plate 18 has aconical periphery 21, which in con- 'unction with the conical periphery17 of the oss of the hanger forms a circular race-wa which is V- roovedin cross section for antlfriction balls 22, and each of the type bars 23has at its-pivotal end a circular ring or eye 24 which has an internalsubstantially V-shaped groove or ball race and constitutes the movablemember of the ball bearing.

It will of course be understood that the bearing may be adjusted bytightening or loosenlng the screw 19. It will also be understood that asfar as some features of my invention are concerned the details of thebearing may be varied and other means of adjustment rovided.

The bal bearing justd'escribedis du licated on the other side of thehanger so t at two type bars are mounted on each hanger, the two typebars being so arated only by the thickness of the platee stem 15 of thehanger. As these, two type bars swing not in parallel planes but inplanes which converge at the printing point, the two faces of the hangerand the conical eripheries 17 of the two bosses are not para el but aresuitably inclined with relation to each other.

' Each circular series of balls-22 is situated in the median plane ofthe associated type bar and in the plane of its movement and is made ofa diameter sufficient to steady the type bar in its swinging motiontoward the rmting point so that there is no tendency to .ateraldeflection of the type bar due to cen- I trifugal force.

- The typewriting machineishown in the drawings s a shift machine andeach of the bars at different angles as indicated in Fig. 3, and inorder to economize the room in the seg'ment and to prevent-the typeblocks of a jaeent ty e bars from interfering with each other, mountthose type bars that are near either end of the segment in a skewed arc,said type bars being mounted progressively nearer to the back of themachine as the end of the segment is approached.

In Fig. 3 I have shown sixteen type bars on the right hand half of thesegment 11, said type bars being mounted on' eight hangers. The fivehangers nearest the middle of the segment are at the same distance fromthe front of the machine, but the three hangers nearest the'end of thesegment are progressively stepped toward the rear of themachine,thesegment itself being bent toward the rear. near its end as indicatedin Fig; 3.

posite to each other or are in ali'nement,

In order that the progressive stepping of the type bars toward the rearmay be regular these three end hangers are constrhcted differently fromthose-hangers near the middle of the machine. In the middle hangers thetwo hearings on each hanger are directly op- Whereas in each of the endhangers the bearings are oif-set or out of alinement, the one nearer theend of the segment being also nearer the-rear of the machine. Moreoverthis off-set is diflerent in extent in the different hangers, the hangerat the extreme end of the segment havin its two bearings off-set to agreater extent t an the others; this being done on account of the factthat the type blocks 25 of the type bars mounted on this hanger standmore nearly at right angles to the type bars than is the case'with thosetype bars on the other hangers. The hanger and type bars shown in Fig. 2are the ones at the extreme end cf the segment as shown in Fig. 3, andin said-figures the extent of off-set is indicated by the lines a and bwhich pass through the respective centers of the two bars. 7

As far as some of the features of my invention are concerned anysuitable means for actuating the type bars may be provided. As shown inthe present instance, each of said type bars is provided at the heelthereof with a lug or arm 28 to which is pivoted the rear end of a link29 which lies beneath the type bar and which at its forward end isconnected with the upstanding arm of a bell crank sublever 30 having aforwardly extending arm which is connected with a key lever 13 by avertically disposed link 31. Each of the sublevers 30 is pivoted at 32ina hanger 33 proassessby Letters Patent, is

1. In a typewriting machine, the bombination of atyipe bar hanger andtwo type bars one pivote on each side of said hanger, the

ivot for one type bar being off-set with reation to the pivot of theother type bar.

In a typewriting machine, the combination of a type bar hanger having oneach side thereof a boss which constitutes one part of a ball bearing,and two type bars, one ivoted to each side of said hanger by said ba Ibear ing, the pivotal center of one of said bearings being -oil-set withrelation to that of the other.

3. In a front strike typewriting machine, the combination of a type barse ment, a series of type bar hangers mounted on said segment, and aseries of type bars ivoted to said hangers, the type bars near t e endsof the segment being pivoted progressively nearer to the rear of themachine, each of said hangers having a plurality of type bars pivotedthereto, and each of the hangers near the ends of the segment having thetype bars pivoted thereto at diilerent distances from'the rear of themachine.

4. In a front strike typewriting machine, the-combination of a series offront strike pivoted type bars, a segment in front of the pivots ofsaidtype bars and having'a type rest on its upper edge, sub-leverspivoted to the front of said segment, links connecting said sub leverswith said type bars and passing through said segment, and keys foractuating said sub-levers.

5. In a typewriting machine, the combination of a series of segmentallyarranged type bars, a series of individual hangers, a plurality of typebars being mounted on each hanger, the construction and arrangement ofthe arts and theconnection'of type bars to theliangers beingsuch thatthe types are arranged in a skewed are when in normal position.

6. In a typewriting machine, the combination of a series of segmentallyarranged type bars, a series of individual hangers, a plurality'of typebars being mounted on each han er, the connection of the type bars tothe angers being such that the pivots of the type bars are arranged in askewed are.

7. In a typewriting machine, the combination of a series of segmentallyarranged type bars, a series of individual hangers to-which has 5 lOQsaid type bars are pivoted by ball bearings, a plurality of type barsbeing mounted on each hanger, the construction and arrangement of theparts and the connection of the type bars. to the hangers being suchthat the types are bearings, a plurality of type bars being mounted oneach hanger, the connection of the type bars to the hangers being suchthat the pivots of the type bars are arranged in a skewed arc.

9. In a front strike typewriting mach ne,

the combination of a type bar se ment, a series of type bar hangersmounted onsaid segment, and a series of type bars piyoted to saidhangeraeach of said han ers having a plurality of type bars pivoted tereto, and the ban ers near the ends of the segment having t -e typebars pivoted thereto ofi set progressively, whereby the pivots arearranged in an are that is not circular.

Signed at Syracuse, in the county of Onondaga'and State of New York this22 day of Aug. A. DQ1907.

HERBERT A. oARnAsTt Witnesses C. E. ToMLmsoN, Lmwoon A. MURRAY.

